1. 代碼

SELECT
    a.id,
    a.activity_name,
    (
        CASE
        WHEN a.activity_end_time > now() THEN
            ‘參與中‘
        ELSE
            (
                CASE
                WHEN (
                    a.activity_doubt <> ‘*‘
                    AND a.activity_doubt < c.doubt
                )
                OR (
                    a.activity_praise 
 
<> ‘*‘
                    AND a.activity_praise > c.praise * 100
                ) THEN
                    ‘未達標‘
                ELSE
                    ‘已達標‘
                END
            )
        END
    ) AS state,
    c.driver_id,
    c.driver_phone,
    c.driver_name,
    c.count
FROM
    (
        SELECT
            id,
            activity_name,
            activity_end_time,
            SUBSTRING_INDEX(
                driver_award_condition,
                
 
"-",
                1
            ) AS activity_doubt,
            SUBSTRING_INDEX(
                driver_award_condition,
                "-",
                - 1
            ) AS activity_praise
        FROM
            car_biz_numprize_base AS b
        WHERE
            1 = 1
        AND activity_name LIKE concat(concat(
 
‘%‘, ‘數據‘), ‘%‘)
        AND id = 1
        AND NOT (
            (
                activity_start_time > ‘2017-10-27 17:16:00‘
            )
            OR (
                activity_end_time < ‘2017-10-27 17:10:00‘
            )
        )
    ) AS a
INNER JOIN (
    SELECT
        i.driver_id,
        i.driver_phone,
        i.driver_name,
        i.numprize_base_id,
        count(order_no) AS count,
        sum(order_doubt) AS doubt,
        sum(order_praise) / count(order_no) AS praise
    FROM
        car_biz_numprize_order_item i
    WHERE
        1 = 1
    AND driver_id = 1000063
    GROUP BY
        i.driver_id,
        i.numprize_base_id
) AS c ON a.id = c.numprize_base_id
HAVING
    state = ‘未達標‘ order by a.created_time desc, c.driver_id asc
LIMIT 0,
 10

2. 需求的來源

2.1 符合活動條件的訂單 達標情況查詢 如下頁面所示 2-1

2.2 活動相關的表

活動表2-2

符合條件訂單表2-3

2.1圖中 活動參與狀態的查詢條件 是在這兩個表中不存在的字段

需從活動表2-2中 獲取 driver_award_condition列 並分割條件 然後對 2-1表進行運算 然後再帥選

2.4 如果在mybatis中 拼sql 小於 大於號 放在 <![ CDATA [>]]>中

SELECT SUBSTRING_INDEX(REVERSE(SUBSTRING_INDEX("aa,bb,cc,dd", ",", 1)), ",", 1); #aa
SELECT SUBSTRING_INDEX(REVERSE(SUBSTRING_INDEX("aa,bb,cc,dd", ",", 2)), ",", 1); #bb
SELECT SUBSTRING_INDEX(REVERSE(SUBSTRING_INDEX("aa,bb,cc,dd", ",", 3)), ",", 1); #cc
SELECT SUBSTRING_INDEX(REVERSE(SUBSTRING_INDEX("aa,bb,cc,dd", ",", 4)), ",", 1); #dd

3.總結

復雜的sql 是一步一步寫出來的

mysql case when & concat & SUBSTRING_INDEX & not & having 使用的小case